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Finding the Fourth Proportional to 2,229.12, 3,342.96 and 767.88

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Solution

The fourth proportional to 2,229.12, 3,342.96 and 767.88 is: 1,151.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,229.12 : 3,342.96 = 767.88 : x
  2. Step 2: Convert to fraction form
    2,229.12/3,342.96 = 767.88/x
  3. Step 3: Cross multiply
    2,229.12x = 3,342.96 × 767.88
  4. Step 4: Simplify right side
    2,229.12x = 2,566,992.12
  5. Step 5: Solve for x
    x = 2,566,992.12/2,229.12
  6. Step 6: Final answer
    x = 1,151.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.